Jobs

Become part of United Tech as an experienced Node.js Backend Developer, contributing to high-performance, scalable products using modern technologies

About the team: join our Backend team, where collaboration and growth are at the heart of everything we do. We are a close-knit group of developers, Product Managers, DevOps, and QA specialists, all dedicated to helping our products thrive. With mentorship from seasoned experts and a strong sense of ownership, everyone here has a voice and can make a real impact.

Working in the social networking niche, we embrace challenges and celebrate progress. This is a dynamic field where you will stay on top of trends, tackle high-load systems, and dive into complex problems. The market is still growing, and there’s plenty of opportunity to carve out your own path and make a difference!
 

Know someone perfect for this role? Recommend a candidate and receive a bonus up to $1500
 

In this role, you will:
 

• Participate in team processes (grooming, sprint planning)
• Develop and deliver product tasks to the production environment
• Handle technical debt tasks
• Create technical designs for product epics
• Decompose epics into actionable tasks
• Investigate and resolve complex issues

It’s all about you:
 

• 4+ years of commercial backend development experience
• 3+ years of Node.js backend experience
• Proficiency with relational and non-relational databases (Postgres, MongoDB, Redis)
• Experience with SOA/Microservices architecture (communication, patterns, development process)
• Knowledge of WebSockets and messaging systems (RabbitMQ, Kafka)
• AWS experience (S3, Aurora, Cloudfront)
• Experience with scaling and high-load systems
• Strong Computer Science fundamentals
• Intermediate English level or higher

What we offer
 

• Care and support: 
• 20 paid vacation days, 15 sick days, and 6 additional days off for family events
• 100% medical insurance coverage
• Sports and equipment reimbursement
• Online yoga class with an instructor from the Ukrainian Yoga Federation
• Team building events, corporate gifts, and stylish merch
• Financial and legal support
• Position retention and support for those who join the Armed Forces of Ukraine
• Participation in social initiatives supporting Ukraine
   
• Comfortable working environment:
• Work from our Kyiv hub or remotely with a flexible schedule 
• Modern equipment or depreciation of your own tools
   
• Investment in your future:
• Collaborate with a highly-skilled team of Middle & Senior professionals, sharing practical cases and expertise in the social networking niche
• 70% of our heads and leads have grown into their roles here – so can you!
• Performance-oriented reviews and Individual Development Plans (IDPs)
• Reimbursement for professional courses and English classes
• Corporate library, book club, and knowledge-sharing events
  
  
   

Hiring process:

• Intro call
• Tech Interview
• Final Interview 
• Reference check
• Offer
   

Hey there! 👋

Are you an expert engineer with experience in leading engineering teams and building scalable software on Node.js? Then we're looking for you. You'd be working with a team of a well-funded Silicon Valley-based tech startup, on a digital product for healthcare professionals in the United States.

What skills we expect you to have: 🎯

• English: Advanced (C1+)
• B.Sc. in Computer Science or similar;
• Excellent communication, collaboration, problem-solving, and analytical skills;
• 5+ years of writing commercial React.js and Node.js apps;
• Extensive experience with SQL-based databases;
• Extensive experience with Amazon Web Services;
• Understanding of LLMs and their application to building web applications;

What would be a huge plus: ✨

• Experience in building CI/CD pipelines;
• You have experience building AI apps (LangChain / LlamaIndex) and with MLOps;

What’s in it for you: 🌴

Professional Growth & Lifestyle:

- Remote work (our team is 100% remote);

- Access & support for obtaining AWS certifications;

- Opportunity to join an international team of a fast-scaling startup;

- Leadership initiatives.

Benefits:

- Annual vacation: 20 business days (100% compensation)

- Annual sick leave: 10 business days (100% compensation)

- Competitive compensation.

Please, feel free to reach out should you have any questions!

Best regards,

Universium Team ❤️

RESPONSIBILITIES:

Coding and Developing:

• Write clean, maintainable, and efficient code
• Develop software features, or applications according to project requirements and design specifications.
• Collaborate with other developers to ensure code consistency and adherence to coding standards.
• Analyze and solve technical challenges and issues that arise during the development process.
• Debug and troubleshoot code to identify and resolve bugs and errors. 

Technical Leadership:

• Provide technical guidance and leadership to the development team.
• Make informed decisions on technology choices, architecture, and design patterns.
• Set and enforce coding standards, best practices, and development methodologies.
• Owns all technical meetings and general technical tasks.
• Delegate and assign tasks to developers if needed.

Project Planning:

• Collaborate with cross-functional team members to understand project requirements and goals.
• Initiate scope estimation with the dev team, and inform a direct manager of the timeline possible.

Technical Problem Solving:

• Assist the team in troubleshooting complex technical issues and making informed decisions to resolve them.
• Offer expertise in finding solutions to technical challenges and roadblocks.

Mentoring and Coaching:

• Mentor developers, providing guidance, support, and opportunities for skill development.
• Foster a culture of continuous learning and improvement within the team.

Architecture and Design:

• Collaborate with the team to define the overall system architecture and design.
• Ensure that architectural decisions are in line with project requirements and long-term goals.

Technical Debt Management:

• Identify and address technical debt by creating tickets, and prioritizing refactoring, code improvements, and maintenance tasks.

Risk Management:

• Identify technical risks and propose strategies to mitigate them.
• Monitor potential challenges and work to prevent them from derailing the project.

Innovation and Best Practices:

• Stay updated on emerging technologies, trends, and industry best practices.
• Introduce innovative ideas and practices to improve development processes.

Documentation:

• Ensure that technical documentation, such as architecture diagrams and design documents are in place, up to date, and accessible to the team.
• Initiate meetings to present technical solutions to the teams

Continuous Improvement:

• Facilitate retrospectives and discussions to identify areas for improvement in development processes, tools, and collaboration.

Job Description

• Collaborate on the development and integration of AI-driven features, leveraging the latest advancements in LLM and NLP
• Conduct research and experiments to explore innovative AI methodologies and incorporate cutting-edge models into customer care products
• Take responsibility for the entire lifecycle of feature developments, from initial discussions with product teams, defining requirements and providing estimates, to actual coding in collaboration with the team, monitoring performance and delivering robust solutions to end-users
• Optimize system performance, reliability and stability, making sure our service remains seamless and accessible
• Participate in technical discussions to improve existing architecture and developer experience

Requirements

• 5+ years of experience as a Server Engineer
• Proven ability in designing server solutions, API design, and handling technical discussions
• Experience implementing and integrating gen-AI models, particularly large language models (LLMs) into production systems
• Passion for product development
• Understanding of business objectives and goals and how to transform business problems into actionable tasks
• Strong communication skills
• Proficiency with Large Language Models, including prompt engineering, fine-tuning, automatic evaluation and Retrieval-Augmented Generation (RAG) — an advantage

About the Team

The Chatbot team’s mission is to make the Customer Care Chatbot the principal choice for users seeking solutions during their Wix experience. We are committed to developing an AI Chatbot that leverages Wix’s knowledge and relies on contextual cues to determine the most appropriate next action to facilitate the user’s journey.

About Wix

Wix makes it possible for anyone to succeed online.

Since 2006, we’ve grown to around 5,500 employees in 22 countries, launched over 40 products, and serve over 243 million users and their visitors worldwide.

At Wix, we push you to innovate, evolve in non-traditional ways, and collaborate. We operate in small teams that work closely together at a high level.

Although we’re already industry leaders in web creation and business, our work is nowhere near done. Our goal is to become the main engine of the Internet so we can create a more open web for all.

We’re proud to be an equal opportunity company. Wix was built around the idea that everyone has the right to be successful, online. This same vision defines us as a company: creating a work environment where everyone is welcome, and anyone has the right to succeed.

We are looking for a skilled Senior Node.js Developer with relocation to Warsaw.

✅ Requirements:

✔️Strong knowledge of JavaScript and the ECMAScript 6 standards

✔️3+ years of commercial experience with Node.js

✔️5+ years of commercial experience in web development

✔️Commercial experience working with high-loaded SQL or NO SQL databases

✔️Commercial experience in implementing the REST, GraphQL, and WebSockets

✔️Understanding of the TDD principles and experience in writing tests

✔️Understanding of microservice architecture principles

✔️Experience with GIT version control system

✔️Experience with RabbitMQ

✔️Experience with Redis

✔️Experience with databases MongoDB, MySQL

✔️At least an Intermediate lvl of English

✅ Will be a plus:

✔️2+ years of hands-on experience developing CI/CD/Micro Services architecture/Containers

✔️Experience with Kubernetes,

✔️Experience with Nats

✔️Experience with TypeScript

✅ Duties and opportunities:

✔️In-house platform development

✔️3rd party API integrations

✔️Actively participate in developing new features from scratch

✅ We offer excellent benefits, including but not limited to:

✔️Working with the latest technologies (Nest, Kubernetes, mongo, graphQL, MySQL, etc)

🧑🏻‍💻Learning and development opportunities and interesting challenging tasks;

📝Official employment in accordance with the laws of Cyprus and the EU, registration of family members;

✈️ Relocation package (tickets, staying in a hotel for 2 weeks);

🏋️‍♂️ Company fitness corner in the office for employees;

📚 Opportunity to develop language skills and partial compensation for the cost of language classes;

🎁 Birthday celebration present;

🏝 Time for proper rest and 24 working days of Annual Vacation;

🍲 Breakfasts and lunches in the office (partially paid by the company).

The international software development and digital solutions company driven by 1,300 talented professionalsl.
Here, everything moves at rocket speed: driving innovation, pioneering projects, and fast-tracking careers.
Together, we turn ideas into action—let’s get started!

We are looking for a skilled Senior Node.js Developer 

Requirements:
- Strong knowledge of JavaScript and the ECMAScript 6 standards
- 3+ years of commercial experience with Node.js and Nest.js
- 5+ years of commercial experience in web development
- Commercial experience of working with high loaded SQL or NO SQL databases
- Commercial experience of implementing the REST, GraphQL and WebSockets
- Understanding of the TDD principles and experience of writing tests
- Understanding of microservice architecture principles
- Experience of GIT version control system
- Experience with RabbitMQ
- Experience with Redis
- Experience with databases MongoDB, MySQL
- At least Intermediate lvl of English

Will be a plus: 
- 2+ years of hands-on experience developing over CI/CD/Micro Services architecture/Containers
- Experience with Kubernetes
- Experience with Nats
- Experience with TypeScript

 Duties and opportunities:

- In-house platform development
- 3rd party API integrations
- Actively participate in developing new features from scratch

 We offer excellent benefits, including but not limited to:

 - Snacks in the Office 
- Attractive office location and facilities
- Medical insurance
- Breakfasts and lunches in the office (partially paid by the Company)
- Languages classes (partially paid by the Company)
- Social Club of the Company

Overview 

Come join us as we scale our retail and commerce loyalty platform! PAR Retail is looking for a Senior NodeJS engineer on its expanding product engineering team as we build and grow our Open Commerce enterprise software-as-a-service platform. 

Open Commerce is a technology suite that enables marketing professionals in the fuel & convenience industry to create real-time, hyper-personalized offers and customer interactions across a variety of channels (mobile, web, SMS, and in-person) to drive customer behavior toward a desired goal. 

Our technology bridges financial payment providers, retail fuel pump technology, and customer experience by wrapping low-level standards-compliant integrations with powerful software abstractions on an ultra-modern software platform. Our platform services and applications are built using a broad swath of technologies (Typescript, NodeJS, Ruby, React, and others), interconnected via GraphQL and RabbitMQ, and run in AWS using Terraform, Helm and Kubernetes (via EKS). 

PAR Retail has its headquarters in Philadelphia, Pennsylvania (USA) and leverages a diverse distributed product engineering and operations team across the United States and Ukraine. PAR Retail offers highly competitive compensation and benefits, as well as an engineering-friendly and product-centric culture. On PAR Retail’s Open Commerce team, we embrace a deeply collaborative software product development process where engineering, design, and product collaborate to shape and ship new functionality. 

Successful candidates will enjoy PAR Retail’s friendly and flexible culture, and embrace our relentless drive to excellence and goal of providing the #1 retail marketing platform in the fuel & convenience industry and beyond. 

Responsibilities 

• Working with the team, design and implement new functionality based on product objectives and requirements. 
• Work with the broader product engineering team to plan and coordinate feature and functionality improvements, as well as resolve bugs and execute technical enhancements, that cross-cut large parts of our platform. 
• Work to continually learn, improve technology skills, expand knowledge of the Open Commerce platform technologies, and gain increasing versatility across the breadth of our platform systems. 
• Expand APIs and business logic, and as needed write or revise customer-facing API documentation. 
• Work with our infrastructure team to enable and enhance highly-available, performant, and well-instrumented backend applications and services that run in our customer environments at substantial scale. 

• Support operations and infrastructure teams for issue resolution on relevant Open Commerce applications or services running in production environments. 

   

Qualifications 

• Practical experience building systems in Node.js 
• At least 5 years industry experience or equivalent 
• Experience building and maintaining backend APIs, including design, implementation, evolution, and maintenance 
• Familiarity with TypeScript, or similar modern strongly-typed language 
• Proficiency using both relational and non-relational database technologies 
• Strong understanding and familiarity with CI/CD pipelines and automated testing 
• Basic knowledge Docker and Kubernetes 
• Familiarity with OAuth and JWT 
• Some experience with front-end JS technologies, esp. React or Angular 
• An ability to work in service-based architectures 
• Highly independent and able to effectively self-organize and prioritize work 
• The ability to write clean code, and the discipline to write effective automated unit tests in order to deliver high-quality system improvements 
• An ability to effectively break down larger bodies of work for delivery as a series of small, self-contained changes to the system 
• Excellent spoken and written communication skills 

• BS/MS degree in Computer Science, Engineering, or equivalent years of professional working experience 

   

Bonus Points 

• Experience with Nest.js and/or GraphQL 
• Experience with Ruby on Rails 
• Experience with AWS 
• Experience working in distributed teams 

• Experience in the retail and/or fuel & convenience industries 

   

PAR Retail Offers:

- Long-term employment;

- Competitive compensation with regular performance-based salary and career development reviews;

- Paid vacations and sick leaves;

- Health insurance program;

- Flexible working hours;

- Sponsored company educational program, corporate library;

- Comfortable and cozy office;

- Funny celebrations, team outings, and company events;

- A unique and friendly environment where everyone can explore and learn new technologies.

We are looking for a skilled Senior Node.js Developer, who will join our team in the office in Warsaw.
 

✅ Requirements:
✔️Strong knowledge of JavaScript and the ECMAScript 6 standards
✔️3+ years of commercial experience with Node.js and Nest.js
✔️5+ years of commercial experience in web development
✔️Commercial experience of working with high loaded SQL or NO SQL databases
✔️Commercial experience of implementing the REST, GraphQL and WebSockets
✔️Understanding of the TDD principles and experience of writing tests
✔️Understanding of microservice architecture principles
✔️Experience of GIT version control system
✔️Experience with RabbitMQ
✔️Experience with Redis
✔️Experience with databases MongoDB, MySQL
✔️At least Intermediate lvl of English

✅ Will be a plus: 
✔️2+ years of hands-on experience developing over CI/CD/Micro Services architecture/Containers
✔️Experience with Kubernetes
✔️Experience with Nats
✔️Experience with TypeScript
 

✅ Duties and opportunities:

✔️In-house platform development
✔️3rd party API integrations
✔️Actively participate in developing new features from scratch
 

✅ We offer excellent benefits, including but not limited to:

🚀 Career growth opportunities in an international and dynamic environment;
📚 Opportunity to develop language skills with partial compensation for language courses;
🎁 Special gifts for birthdays, weddings, and newborns;
🏝️ 20 working days of paid annual vacation, plus paid sick leaves;
🍲 Office snacks and refreshments;
🏋️‍♂️ Sports package to support a healthy lifestyle;
🩺 Comprehensive medical insurance for you and your partner;
📍 Comfortable office with great facilities in a prime location;
 🎉 Exciting corporate events, team-building activities, and international company parties.

FAVBET Tech develops software that is used by millions of players around the world for the international company FAVBET Entertainment.
We develop innovations in the field of gambling and betting through a complex multi-component platform which is capable to withstand enormous loads and provide a unique experience for players.
FAVBET Tech does not organize and conduct gambling on its platform. Its main focus is software development.

Main areas of work:

• Betting/Gambling Platform Software Development — software development that is easy to use and personalized for each customer.
• Highload Development — development of highly loaded services and systems.
• CRM System Development — development of a number of services to ensure a high level of customer service, effective engagement of new customers and retention of existing ones.
• Big Data — development of complex systems for processing and analysis of big data.
• Cloud Services — we use cloud technologies for scaling and business efficiency.

Requirements:

• Proficiency in Node.js, with a strong understanding of core principles, performance optimization, testing, pipelines, deploying, monitoring, scaling, etc.
• Experience with PostgreSQL, particularly in performance optimization.
• Ability to configure and manage message brokers such as RabbitMQ.
• Familiarity with caching mechanisms like Redis.
• Competence in writing and maintaining unit, integration, and E2E tests.
• Solid understanding of software architecture design, including UML and design patterns.
• Knowledge of RestAPI and OpenAPI specifications.
• Experience with Git flow for version control.
• Working experience 
   At least 5+ years of hands-on experience with Node.js.
• Minimum 3 years of experience working with relational databases (PostgreSQL).
• At least 3 years of experience in test implementation (unit, integration, E2E).
• Demonstrated experience in developing new features and enhancing existing services.
• Experience in handling complex problems and providing effective solutions.
• Consistent improvement of code organization and application design.
• Management skills (if needed) 
• Potential for team leadership and management responsibilities.
• Ability to mentor and guide team members.
• Strong organizational skills and the ability to manage multiple tasks effectively.
• Experience or aptitude in making architectural decisions and leading development initiatives.
• Domain experience / Preferable companies (FinTech, E-commerce, gambling etc.) 
      

  Experience in FinTech, E-commerce, or gambling sectors is preferred.

  Proven experience in performance tuning and handling high-load systems.

  Background in working with microservices architecture and optimizing their performance.

Additional requirements (foreign language) 
    

  Strong command of English, particularly for reading and writing technical documentation (Upper-Intermediate level).

  Ability to maintain emotional well-being and manage stress effectively.

  Proactive approach to learning and staying updated with the latest technologies and best practices.

  Capability to create and maintain clear and concise documentation in English.

•    Express.js
•    Nest.js (good to have)
•    Typescript  
•    Unit/Integration/E2E testing
•    Jest
•    CucumberJS
•    RabbitMQ
•    Redis
•    Software Architecture Design/UML/Design Patterns
•    PlantUML (good to have)
•    RestAPI
•    OpenAPI Spec
•    Postgresql
•    Sequelize
•    Prisma (good to have)
•    Kubernetes
•    Understanding Go code (would be a plus)
•    Solid understanding OOP/Solid/Quality Gates 

Responsibilities:

•  Development of new features and system implementations: Creating new functionalities, integrating new systems, and ensuring compliance with product requirements.
• Refactoring existing code: Optimizing and improving existing code according to established guidelines, ensuring system stability and performance.
• Optimizing PostgreSQL performance: Configuring, optimizing, and monitoring the PostgreSQL database to ensure high performance and reliability.
• Setting up and configuring message brokers: Working with RabbitMQ to ensure efficient message processing, resolving issues with queues and retries.
• Testing and quality assurance: Writing and maintaining integration, unit, and E2E tests, ensuring high test coverage, controlling code quality, and participating in CI/CD processes. 

We  offer:

• 30 days off per year (vacation and sick days) — we value rest and recreation. We also comply with the national holidays.
• Medical insurance for employees and the possibility of training employees at the expense of the company and gym membership.
• Remote work; after Ukraine wins the war — our own modern lofty office with spacious workplace, and brand-new work equipment (near Pochaina metro station).
• Flexible work schedule — we expect a full-time commitment but do not track your working hours.
• Flat hierarchy without micromanagement — our doors are open, and all teammates are approachable.

During the war, the company actively supports the Ministry of Digital Transformation of Ukraine in the initiative to deploy an IT army and has already organized its own cyber warfare unit, which makes a crushing blow to the enemy’s IT infrastructure 24/7, coordinates with other cyber volunteers and plans offensive actions on its IT front line.

FAVBET Tech develops software that is used by millions of players around the world for the international company FAVBET Entertainment.
We develop innovations in the field of gambling and betting through a complex multi-component platform which is capable to withstand enormous loads and provide a unique experience for players.
FAVBET Tech does not organize and conduct gambling on its platform. Its main focus is software development.

Main areas of work:

• Betting/Gambling Platform Software Development — software development that is easy to use and personalized for each customer.
• Highload Development — development of highly loaded services and systems.
• CRM System Development — development of a number of services to ensure a high level of customer service, effective engagement of new customers and retention of existing ones.
• Big Data — development of complex systems for processing and analysis of big data.
• Cloud Services — we use cloud technologies for scaling and business efficiency.

Requirements:

• Proficiency in Node.js, with a strong understanding of core principles, performance optimization, testing, pipelines, deploying, monitoring, scaling, etc.
• Experience with PostgreSQL, particularly in performance optimization.
• Ability to configure and manage message brokers such as RabbitMQ.
• Familiarity with caching mechanisms like Redis.
• Competence in writing and maintaining unit, integration, and E2E tests.
• Solid understanding of software architecture design, including UML and design patterns.
• Knowledge of RestAPI and OpenAPI specifications.
• Experience with Git flow for version control.
• Working experience 
   At least 5+ years of hands-on experience with Node.js.
• Minimum 3 years of experience working with relational databases (PostgreSQL).
• At least 3 years of experience in test implementation (unit, integration, E2E).
• Demonstrated experience in developing new features and enhancing existing services.
• Experience in handling complex problems and providing effective solutions.
• Consistent improvement of code organization and application design.
• Management skills (if needed) 
• Potential for team leadership and management responsibilities.
• Ability to mentor and guide team members.
• Strong organizational skills and the ability to manage multiple tasks effectively.
• Experience or aptitude in making architectural decisions and leading development initiatives.
• Domain experience / Preferable companies (FinTech, E-commerce, gambling etc.) 
      

  Experience in FinTech, E-commerce, or gambling sectors is preferred.

  Proven experience in performance tuning and handling high-load systems.

  Background in working with microservices architecture and optimizing their performance.

Additional requirements (foreign language) 
    

  Strong command of English, particularly for reading and writing technical documentation (Upper-Intermediate level).

  Ability to maintain emotional well-being and manage stress effectively.

  Proactive approach to learning and staying updated with the latest technologies and best practices.

  Capability to create and maintain clear and concise documentation in English.

•    Express.js
•    Nest.js (good to have)
•    Typescript  
•    Unit/Integration/E2E testing
•    Jest
•    CucumberJS
•    RabbitMQ
•    Redis
•    Software Architecture Design/UML/Design Patterns
•    PlantUML (good to have)
•    RestAPI
•    OpenAPI Spec
•    Postgresql
•    Sequelize
•    Prisma (good to have)
•    Kubernetes
•    Understanding Go code (would be a plus)
•    Solid understanding OOP/Solid/Quality Gates 

Responsibilities:

•  Development of new features and system implementations: Creating new functionalities, integrating new systems, and ensuring compliance with product requirements.
• Refactoring existing code: Optimizing and improving existing code according to established guidelines, ensuring system stability and performance.
• Optimizing PostgreSQL performance: Configuring, optimizing, and monitoring the PostgreSQL database to ensure high performance and reliability.
• Setting up and configuring message brokers: Working with RabbitMQ to ensure efficient message processing, resolving issues with queues and retries.
• Testing and quality assurance: Writing and maintaining integration, unit, and E2E tests, ensuring high test coverage, controlling code quality, and participating in CI/CD processes. 

We  offer:

• 30 days off per year (vacation and sick days) — we value rest and recreation. We also comply with the national holidays.
• Medical insurance for employees and the possibility of training employees at the expense of the company and gym membership.
• Remote work; after Ukraine wins the war — our own modern lofty office with spacious workplace, and brand-new work equipment (near Pochaina metro station).
• Flexible work schedule — we expect a full-time commitment but do not track your working hours.
• Flat hierarchy without micromanagement — our doors are open, and all teammates are approachable.

During the war, the company actively supports the Ministry of Digital Transformation of Ukraine in the initiative to deploy an IT army and has already organized its own cyber warfare unit, which makes a crushing blow to the enemy’s IT infrastructure 24/7, coordinates with other cyber volunteers and plans offensive actions on its IT front line.

We are looking for a highly experienced Senior Backend Engineer with a strong background in designing and developing scalable backend systems. You will be working on a high-traffic, performance-critical application in the esports domain. This role requires deep technical expertise, ownership mindset, and the ability to contribute to system architecture and decision-making.

Key Responsibilities

• Design, develop, and maintain robust backend services using NestJS, following best practices in modular architecture, DI, and middleware design.
• Architect and optimize complex PostgreSQL schemas, including migrations, relationships, and handling of semi-structured data via JSONB.
• Set up and tune Elasticsearch for multilingual, full-text search with support for analyzers, stemming, and synonyms.
• Implement and maintain synchronization strategies between PostgreSQL and Elasticsearch, using queues or manual sync mechanisms.
• Build reliable, well-documented RESTful APIs; experience with GraphQL is a strong advantage.
• Ensure secure access control, rate-limiting, and robust authentication mechanisms.
• Utilize Redis for caching, rate-limiting, and background job processing (e.g., Elasticsearch sync jobs).
• Write clean, maintainable, and thoroughly tested code using Jest or similar testing frameworks.
• Collaborate with cross-functional teams, take ownership of feature delivery, and contribute to the overall architecture and tech roadmap.

Required Skills

• 5+ years of professional experience in backend development, ideally within high-scale or real-time systems.
• Production-level experience with NestJS, PostgreSQL, Elasticsearch, and Redis.
• Deep understanding of system design, data modeling, and query optimization.
• Solid grasp of event-driven architecture and asynchronous job processing.
• Comfortable working in fast-paced, product-focused environments.
• Excellent problem-solving skills and a proactive mindset.
• English: B2 level or higher – able to clearly articulate technical concepts and actively participate in discussions.

The software development company and digital solutions provider. The company has created over 65 cutting-edge products spanning 20 different markets.
Our team of around 1 200 tech-savvy professionals successfully deliver scalable projects that are custom-made to the customers’ needs.
We also strive to create a culture centered around personal and professional growth for employees, in a positive and welcoming environment.

We are looking for a skilled Senior Node.js Developer

✅ Requirements:
✔️Strong knowledge of JavaScript and the ECMAScript 6 standards
✔️3+ years of commercial experience with Node.js
✔️5+ years of commercial experience in web development
✔️Commercial experience working with high-loaded SQL or NO SQL databases
✔️Commercial experience in implementing the REST, GraphQL, and WebSockets
✔️Understanding of the TDD principles and experience in writing tests
✔️Understanding of microservice architecture principles
✔️Experience with GIT version control system
✔️Experience with RabbitMQ
✔️Experience with Redis
✔️Experience with databases MongoDB, MySQL
✔️At least an Intermediate lvl of English

✅ Will be a plus:
✔️2+ years of hands-on experience developing CI/CD/Micro Services architecture/Containers
✔️Experience with Kubernetes,
✔️Experience with Nats
✔️Experience with TypeScript

✅ Duties and opportunities:
✔️In-house platform development
✔️3rd party API integrations
✔️Actively participate in developing new features from scratch
 

✅ We offer excellent benefits, including but not limited to:
✔️Working with the latest technologies (Nest, Kubernetes, mongo, graphQL, MySQL, etc)
🧑🏻‍💻Learning and development opportunities and interesting challenging tasks;
🏋️‍♂️ Company fitness corner in the office for employees;
📚 Opportunity to develop language skills and partial compensation for the cost of language classes;
🎁 Birthday celebration present;
🏝 Time for proper rest and 24 working days of Annual Vacation;
🍲 Breakfasts and lunches in the office (partially paid by the company).

Join us at Provectus as part of a team dedicated to building cutting-edge technology solutions that have a positive impact on society. Our company specializes in AI and ML technologies, cloud services, and data engineering, and we take pride in our ability to innovate and push the boundaries of what's possible.

We are seeking a talented and versatile Full-Stack Engineer with strong experience in Next.js to join our innovative team.

Requirements:

• 5+ years of experience in front-end development;
• Production experience with Next.js v13+ (App Router, Server Actions);
• Experience with Nest.js;
• Solid knowledge of TypeScript;
• Solid understanding of relational and non-relational databases (Aurora, DynamoDB);
• Familiarity with ChakraUI or similar UI Component Libraries;
• Proficiency in writing unit and integration tests;
• Full application lifecycle experience;
• Excellent communication and collaboration skills;
• Understanding of design patterns and software architectures;
• Experience with cloud services, preferably AWS Cloud;
• Proficiency with GIT for version control.

Preferred Qualifications:

• Experience with AWS services;
• Experience setting up CI/CD pipelines;
• Understanding of testing principles and experience with testing tools.

Responsibilities:

• Write well-designed, testable, efficient code by using best software development practices;
• Work closely, collaboratively, and creatively with product owners to build a user experience to support the business users' needs;
• Work well in a team environment of 4 - 5 developers, but taking individual ownership of deliverables and ensuring quality through comprehensive unit tests;
• Code optimization and performance with best practices in Javascript;
• Create a user interface by using standard HTML/CSS practices;
• Gather and refine specifications and requirements based on technical needs;
• Ensure cross-browser capability of code and HTML markup;
• Create and maintain software documentation;
• Stay tuned with the recent Web technologies.

FAVBET Tech develops software that is used by millions of players around the world for the international company FAVBET Entertainment.
We develop innovations in the field of gambling and betting through a complex multi-component platform which is capable to withstand enormous loads and provide a unique experience for players.
FAVBET Tech does not organize and conduct gambling on its platform. Its main focus is software development.

Main areas of work:

• Betting/Gambling Platform Software Development — software development that is easy to use and personalized for each customer;
• Highload Development — development of highly loaded services and systems;
• CRM System Development — development of a number of services to ensure a high level of customer service, effective engagement of new customers and retention of existing ones;
• Big Data — development of complex systems for processing and analysis of big data;
• Cloud Services — we use cloud technologies for scaling and business efficiency.

Requirements:

• 4+ years of commercial experience in Node.js (Fastify/Koa/NestJS would be a +).
•    Strong skills in relational and NoSQL databases (PostgreSQL, MySQL, Redis, MongoDB).
•    Strong expertise in TypeScript.
•    Experience with CDN implementation and performance optimization
•    Unit/integration/load tests
•    Understanding of design patterns, clean architecture.

•    Proven track record in developing scalable, enterprise-level solutions

   

  Responsibilities :

•   Implementation of API migration to a new approach
•    Development of new features and new parts of the services
•    Handling complex problems that might arise during solution development and provide field support with creative and rapid solutions  
•    Constantly improving code organization and evolving application design
•    Writing new and updating existing integration tests

We offer:

• 30 days off per year (vacation and sick days) — we value rest and recreation. We also comply with the national holidays.
• Medical insurance for employees and the possibility of training employees at the expense of the company and gym membership.
• Remote work; after Ukraine wins the war — our own modern lofty office with spacious workplace, and brand-new work equipment (near Pochaina metro station).
• Flexible work schedule — we expect a full-time commitment but do not track your working hours.
• Flat hierarchy without micromanagement — our doors are open, and all teammates are approachable.

During the war, the company actively supports the Ministry of Digital Transformation of Ukraine in the initiative to deploy an IT army and has already organized its own cyber warfare unit, which makes a crushing blow to the enemy’s IT infrastructure 24/7, coordinates with other cyber volunteers and plans offensive actions on its IT front line.

Sharkscode is looking for a Node.js Engineer to join our team!

To achieve the results you’ll need:
- 5+ years of commercial development experience with Node.js, Express.js;
- Deep knowledge of MongoDB, MySQL, PostgreSQL(optional), redis(optional);
- Experience with queues (rabbit);
- Experience in connecting third-party services, designing/writing API;
- Understanding of the specifics of working with distributed systems

Will be a plus:
- TypeScript, nest;
- Experience in covering code with autotests (Unit/Integration/E2E);
- Experience with high-load systems

How exactly you'll influence the company’s progress:
- Design and develop a product;
- Develop integrations with third-party financial and technical services;
- Design and develop public payment web services and internal microservices;
- Participate in decision-making on the feasibility of using certain technologies/practices at the platform level;
- Follow a development culture and share the knowledge already acquired with the team.

For comfortable and effective cooperation we offer the following:
- Opportunity to influence and feel your impact inside the company;
- Compensation that grows alongside your achievements;
- Paid vacation (17 days/year) and sick leaves;
- Medical insurance;
- Budget for conferences, seminars, and training that will help you grow as a professional;
- Free English courses;
- Flexible working hours;
- We have a cozy, modern office filled with everything you need in the historic center of Kyiv with free parking places.

Our stages: 

Interview with recruiter-> Tech Interview-> Offer